Mueller's family can confirm that the 26-year-old Prescott woman was taken hostage in 2013 during a humanitarian trip to Syria.
Now her small Arizona community is shocked to learn she's from Prescott.
Mueller graduated from Tri City College prep in Prescott and went on to attend Northern Arizona University. She spent the last several years traveling the world, seeking to help the most vulnerable people. In Syria, she was helping refugees.
This is Mueller in a Youtube video:
"I am in solidarity with the Syrian people. I reject the brutality and killing that the Syrian authorities [are] committing against [the] Syrian people."
Her family says she was taken hostage while leaving a Syrian hospital. Those in Prescott and around the world tonight are left with more questions than answers.